145105213 has 4 divisors (see below), whose sum is σ = 158296608. Its totient is φ = 131913820.

The previous prime is 145105199. The next prime is 145105243. The reversal of 145105213 is 312501541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312501541 = 11 ⋅28409231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145105213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145105243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6595681 + ... + 6595702.

It is an arithmetic number, because the mean of its divisors is an integer number (39574152).

Almost surely, 2^145105213 is an apocalyptic number.

It is an amenable number.

145105213 is a deficient number, since it is larger than the sum of its proper divisors (13191395).

145105213 is a wasteful number, since it uses less digits than its factorization.

145105213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13191394.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 145105213 is about 12045.9625186201. The cubic root of 145105213 is about 525.4858245143.

Adding to 145105213 its reverse (312501541), we get a palindrome (457606754).

The spelling of 145105213 in words is "one hundred forty-five million, one hundred five thousand, two hundred thirteen".